events: add new "SignalUSR1" event

mhinz · mhinz · commit 9649059d4e60 · 2019-01-31T01:18:55.000+01:00
..which gets triggered when SIGUSR1 is sent to the nvim process. Closes #9562
diff --git a/runtime/doc/autocmd.txt b/runtime/doc/autocmd.txt
@@ -290,6 +290,8 @@ Name			triggered by ~
 |DiffUpdated|		after diffs have been updated
 |DirChanged|		after the |current-directory| was changed
 
+|SignalUSR1|		after the nvim process received an USR1 signal
+
 |FileChangedShell|	Vim notices that a file changed since editing started
 |FileChangedShellPost|	after handling a file changed since editing started
 |FileChangedRO|		before making the first change to a read-only file
@@ -918,6 +920,9 @@ ShellCmdPost			After executing a shell command with |:!cmd|,
 ShellFilterPost			After executing a shell command with
 				":{range}!cmd", ":w !cmd" or ":r !cmd".
 				Can be used to check for any changed files.
+							*SignalUSR1*
+SignalUSR1			After the nvim process received an USR1
+				signal.
 							*SourcePre*
 SourcePre			Before sourcing a Vim script. |:source|
 				<afile> is the name of the file being sourced.
diff --git a/src/nvim/auevents.lua b/src/nvim/auevents.lua
@@ -74,6 +74,7 @@ return {
     'SessionLoadPost',        -- after loading a session file
     'ShellCmdPost',           -- after ":!cmd"
     'ShellFilterPost',        -- after ":1,2!cmd", ":w !cmd", ":r !cmd".
+    'SignalUSR1',             -- signal USR1
     'SourceCmd',              -- sourcing a Vim script using command
     'SourcePre',              -- before sourcing a Vim script
     'SpellFileMissing',       -- spell file missing
@@ -115,6 +116,7 @@ return {
   -- syntax file
   nvim_specific = {
     DirChanged=true,
+    SignalUSR1=true,
     TabClosed=true,
     TabNew=true,
     TabNewEntered=true,
diff --git a/src/nvim/fileio.c b/src/nvim/fileio.c
@@ -6917,6 +6917,7 @@ static bool apply_autocmds_group(event_T event, char_u *fname, char_u *fname_io,
         || event == EVENT_REMOTEREPLY
         || event == EVENT_SPELLFILEMISSING
         || event == EVENT_SYNTAX
+        || event == EVENT_SIGNALUSR1
         || event == EVENT_TABCLOSED) {
       fname = vim_strsave(fname);
     } else {
diff --git a/src/nvim/os/signal.c b/src/nvim/os/signal.c
@@ -15,14 +15,15 @@
 #include "nvim/globals.h"
 #include "nvim/memline.h"
 #include "nvim/eval.h"
+#include "nvim/fileio.h"
 #include "nvim/main.h"
 #include "nvim/memory.h"
 #include "nvim/misc1.h"
 #include "nvim/event/signal.h"
 #include "nvim/os/signal.h"
 #include "nvim/event/loop.h"
 
-static SignalWatcher spipe, shup, squit, sterm;
+static SignalWatcher spipe, shup, squit, sterm, susr1;
 #ifdef SIGPWR
 static SignalWatcher spwr;
 #endif
@@ -61,6 +62,10 @@ void signal_init(void)
   signal_watcher_init(&main_loop, &spwr, NULL);
   signal_watcher_start(&spwr, on_signal, SIGPWR);
 #endif
+#ifdef SIGUSR1
+  signal_watcher_init(&main_loop, &susr1, NULL);
+  signal_watcher_start(&susr1, on_signal, SIGUSR1);
+#endif
 }
 
 void signal_teardown(void)
@@ -73,6 +78,9 @@ void signal_teardown(void)
 #ifdef SIGPWR
   signal_watcher_close(&spwr, NULL);
 #endif
+#ifdef SIGUSR1
+  signal_watcher_close(&susr1, NULL);
+#endif
 }
 
 void signal_stop(void)
@@ -84,6 +92,9 @@ void signal_stop(void)
 #ifdef SIGPWR
   signal_watcher_stop(&spwr);
 #endif
+#ifdef SIGUSR1
+  signal_watcher_stop(&susr1);
+#endif
 }
 
 void signal_reject_deadly(void)
@@ -115,6 +126,10 @@ static char * signal_name(int signum)
 #endif
     case SIGHUP:
       return "SIGHUP";
+#ifdef SIGUSR1
+    case SIGUSR1:
+      return "SIGUSR1";
+#endif
     default:
       return "Unknown";
   }
@@ -162,6 +177,10 @@ static void on_signal(SignalWatcher *handle, int signum, void *data)
         deadly_signal(signum);
       }
       break;
+#ifdef SIGUSR1
+    case SIGUSR1:
+      apply_autocmds(EVENT_SIGNALUSR1, NULL, NULL, true, curbuf);
+#endif
     default:
       ELOG("invalid signal: %d", signum);
       break;
